Call With
EBX: Contains a Windows VM Handle.
EBP: Points to the Windows VM's Client Registers.
DL: Contains the VGA read plane number (0, 1, 2, 3)
DH: Contains the VGA write plane mask (1 for plane 0, 2 for plane 1, 4 for plane 2, and 8 for plane 3).
Return Values
Save anything that you use.
Remarks
This function is called when the Main VDD is asked to restore VRAM for a full screen VM. It allows mini-VDD's operating on non-standard hardware to set the VGA read and write planes.